The curved surface of a sphere is 64 π cm2. Find its radius?
The curved surface of a sphere is 64 π cm2. Find its radius?
A. 1 cm
B. 2 cm
C. 4 cm
D. 3 cm
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Find the lowest 4-digit number which when divided by 3, 4 or 5 leaves a remainder of 2 in each case?
Find the lowest 4-digit number which when divided by 3, 4 or 5 leaves a remainder of 2 in each case?A. 1020
B. 1026
C. 1030
D. 1022
Explanation:
Lowest 4-digit number is 1000.
LCM of 3, 4 and 5 is 60.
Dividing 1000 by 60, we get the remainder 40. Thus, the lowest 4-digit number that exactly divisible by 3, 4 and 5 is 1000 + (60 – 40) = 1020.
Now, add the remainder 2 that’s required. Thus, the answer is 1022.A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. What is the speed of the car?
A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopg at the stations. What is the speed of the car?A. 80 kmph
B. 102 kmph
C. 120 kmph
D. 140 kmphRayyan purchased a refrigerator and a mobile phone for Rs. 15000 and Rs. 8000 respectively. He sold the refrigerator at a loss of 4 percent and the mobile phone at a profit of 10 percent. Overall he make a________?
Rayyan purchased a refrigerator and a mobile phone for Rs. 15000 and Rs. 8000 respectively. He sold the refrigerator at a loss of 4 percent and the mobile phone at a profit of 10 percent. Overall he make a________?A. loss of Rs. 200
B. loss of Rs. 100
C. profit of Rs. 100
D. profit of Rs. 200
E. None of these
Explanation:
Let the SP of the refrigerator and the mobile phone be Rs. r and Rs. m respectively.
r = 15000(1 – 4/100) = 15000 – 600
m = 8000(1 + 10/100) = 8000 + 800
Total SP – Total CP = r + m – (15000 + 8000) = -600 + 800 = Rs. 200
As this is positive, an overall profit of Rs. 200 was made.The diameters of two spheres are in the ratio 1:2 what is the ratio of their volumes?
The diameters of two spheres are in the ratio 1:2 what is the ratio of their volumes?A. 3:4
B. 9:16
C. 1:8
D. 4:3A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in?
A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in?A. 16 hrs
B. 20 hrs
C. 40 hrs
D. 25 hrs
Explanation:
1/8 – 1/x = 1/10
x = 40In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?A. 30%
B. 70%
C. 100%
D. 250%
Explanation:
Let C.P. = Rs. 100. Then, profit = Rs. 320, S.P. = Rs. 420
New C.P. = 125% of Rs. 100 = Rs. 125.
New S.P. = Rs. 420
Profit = 420 – 125 = Rs. 295
Required percentage = 295/420 * 100 = 1475/21 = 70%